Questyle M15i

The Questyle M15i USB Portable DAC & Headphone Amplifier is a pocket-sized dongle DAC built around Apple MFi certification and four current mode amplification engines. That means it works flawlessly with iPhone and iPad without draining your battery or causing software glitches, and it has enough power to drive both sensitive IEMs and hungrier over-ear headphones. You get both 3.5mm single-ended and 4.4mm balanced outputs, so you can plug in whatever cable you have.

The noise floor sits at -130dB, which is genuinely low. You hear more detail in quiet passages, and the background stays silent even with sensitive multi-driver IEMs. The M15i also works across iOS, Android, Windows, and Mac without needing separate drivers on modern operating systems. A red LED indicator shows you the sampling rate, one light for standard PCM up to 48kHz and two lights for high-res PCM or DSD.

At $249, this is a solid portable DAC and headphone amplifier for anyone who wants better sound from their phone or laptop without adding bulk. It is small enough to toss in a pocket or bag, and the dual outputs make it flexible enough to handle most headphones you throw at it.